Mold for lock-cylinders and key-hubs.



- No. 643,656. Patented Feb. 20, I900.

F. &. H. F. KEIL.

HELD FOB LOCK CYLINDERS AND KEY "UB8.

(Application filed Sept. 8, 1898.)

(No Model.) 5 Sheets-Sheet l.

WITNESSES Tn: Nqfims PETERS cu PHOTO-LITNO-.WASHINGTON n c No. 643,656. Patented Feb.-20, 1900. F. &. H. F. KEIL.

MOLD FOR LOCK CYLINDERS AND KEY HUBS.

(Application filed s ept. 3, 189.8.)

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No. 643,656. Patented Feb. 20, I900.

F. KEIL.

F. & H.

MULD FUR LUCK CYLINDERS AND KEY "UB3.

A nmion filed a, 1898.)

(N0 Modal.) I 5 Sheets-Shoat 3.

Patented Feb. 20, I900.

F. &. H. F. KEIL. MOLD FOR LOCK CYLINDERS AND KEY HUBS.

A ucmon filed se e. 8, 1629s) 5 Shaats-Shoat 4.

(No Model.)

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No. 643,656. Patented Feb. 20, I900. F. &. H. F. KEIL.

MOLD FOR LOCK CYLINDERS AND KEY HUBS.

(Application filed Sept. 3, 1898.) (N o M o d e l 5 Sheets-Sheet 5.

WITNESSES NITED STATES PATENT tries.

FRANCIS KEIL AND HENRY FRANCIS KEIL, OF NEIV YORK, N. Y.

MOLD FOR LOCK-CYLINDERS AND KEY-HUBS.

SPECIFICATION forming part of Letters Patent No. 643,656, dated February 20, 1900.

Application filed September 3, 1898. Serial No. 690,216. (No model.)

To all whom it may concern:

Be it known that we, FRANCIS KEIL and HENRY FRANCIS KEIL, citizens of the United States, and residents of'the city of New York, borough of Bronx, in the county of New York and State of New York, have invented a certain new and useful Improved Mold for Casting Pin-Tu mbler-Lock Cylinders and Key- I-Iubs, of which the followingis a specification.

Our invention relates to the construction of molds for casting cylinders and keyways in pin-tumbler locks by which the entire parts are cast, each part provided during the process of casting with the necessary screw-threads,

pin-locks, tapped recesses to receive screws,

and keyway, so that when the parts are assembled they will fit each other without further. operation.

Heretofore the mode of producing a pintumbler look was to first cast the separate parts in the rough or blank. Then each piece was in turn submitted to the operation of screw-threading, pin-hole-boring, keywayreaming, and other machinery, thus necessitating a slow and tedious and expensive operation before a complete look was produced. It is notorious that pin-tumbler locks are the mostseoure and reliable locks known against being picked or opened by any but the key conforming exactly to the detail setting of the pins, and such slight changes are necessary to prevent the use of any other key that it is said millions of combinations can be made. This fact has made the pin-tumbler lock a Very desirable one by the public; but the extreme cost of manufacturing under the old system prevented a general use of such locks. By our system of molds we are enabled to put such locks on the market at a very low cost.

In the construction of the molds it is necessary that only the best material shall be used and that great nicety of the fitting of the parts be observed,and yet there must be made the proper provision for the exit of the air contained in the mold before the molten metal is poured into the same, so that the cylinder when withdrawn from the mold will have no air-holes or rough edges or lines Where the mold meets, since that would necessitate the hand operation which it is our endeavor to obviate. It will be observed that the cylintrue, an operation which heretofore required the utmost skill and finest machinery to bore and have the same true. It will be also observed that the key-slot, which, by the way, may by the use of our molds be of such a serpentine shape that no machinery or handwork could produce the same, which in itself would be one of the greatest safeguards against the insertion of a foreign key. The operation of cutting the keyway heretofore alone was a very expensive and exact one. Again, under the old method it was a diflicult, exact, and expensive operation to fit the key-hub into the cylinder and took much time to perform the operation.- In short, a pintumbler lock that it has taken heretofore much time to produce at a great cost can by the aid of molds constructed in conformity with our invention be produced at a nominal cost and in a comparatively-short time.

Having described the state of the art of producing pin-tumbler locks heretofore and the difference of producing the same by the aid of molds constructed in conformity with such as are herein described, we will now proceed to describe the various parts in detail and as assembled and their operation, so that those skilled in the art may at the expiration of such Letters Patent as may herein be granted make and use the same.

It will be seen that our molds are constructed in as few parts as possible, it being our object to simplify the same in construction and use. It is obvious that the same may be divided into many more parts than herein shown without departing from the spirit of our invention, the essential feature of our invention being to produce a mold or set of molds by means of which the tumblercylinder and key-hub may be cast, having all necessary screw-threads, pin-holes, keyway, key-hub, centers, and all recesses threaded or unthreaded and finished to completion, or nearly so, ready for assemblage.

It is beyond cavil that by the use of our mold in the manufacture of pin-tumbler locks We produce a commercially-cheaper lock than now can be produced under the present methods of manufacture.

In the drawings like letters and figures represent like parts.

Figure 1 represents a plan view of the cylinder-mold in position to receive molten metal, in which the dotted lines show the shackle-handle when the shackle is released to spread the mold. Fig. 2 is a front elevation of the cylinder-mold as shown in Fig. 1. Fig. 3 is a plan view showing the cylindermold open and exposing the pin-hole former. Fig. 4 represents a longitudinal section of the cylindeiamold on line 4 et of Fig. 1, showing the key-hub core in the cylinder, the bedplate held in position by a screw. Fig. 4 is a horizontal section of the cylinder on line 4 i of Fig. 7, showing the opening for pin-bores and the retaining-recesses and key-hub core.

Fig. 5 shows a cross-section of the cylindermold on line 5 5 of Fig. 4 at the point or part where the mold is separated and shows the manner in which the same has its bottom dovetailed into the face of the mold-bed and shows thekey-hub and core and the pin-hole former in position after the molten metal has been poured in the cylinder. Fig. 6 is a sectional view on the lines (5 (i of Fig. 1 looking in the direction of the arrow, showing the manner in which the same is cut to form the exterior thread and retaining-recesses and also the fluid-channel and the key-hub bore and the vent-recesses 6 6 Fig. 7 is a perspective view ofthe complete cylinder removed from the mold and ready for immediate assembling. Fig. 8 represents a plan or top view of the key-hub mold in position to receive the metal. Fig. 9 represents the same open and shows the key-slot former in position. Fig. 10 represents a front elevation of the key-hub mold in a closed position. Fig. 11 is a section of the mold on line 11 11, Fig. 10. Fig. 12 is a face view of section 0 of the keyhub mold. Fig. 13 is a sectional View, on the plan of line 13 13 of Fig. 11, of the keyhub mold, showing the inpour channel, the key-hub recess, and the retain-screw-holeforming pins, and the pin-bed. Fig. 1. represents a perspective view of the complete key-hub, showing the pin-holes and key-slot. Fig. 15 is a side view of the key-hub, showing the key-slot inverted. Fig. 16 is a plan View of the key-hub, showing the shoulder and the key-slot and retaining-screw holes. Fig. 17 is a transverse section of the key-hub, showing the key-slot, which may be of any suitable shape.

In Fig. 1 numeral 1 is a bed-plate, having a portion of its face recessed from end to end to form a mortise 1 to receive the tenon 1 of the mold proper and is also provided with a circular recess 1 to receive the removable disk 1". This bed-plate 1 is provided at one side with the bar 2, which is aflixed to the bed-plate by screws or otherwise and is preforably separable in case the eye 2 should break and is provided at each end with eyes 2" to receive the spur 3 of the mold-handles The mold-handles 3 are pivoted to the arms 3 of the mold-sections by pivots i).

A- and B are sections which form the mold 4. This mold is made of the proper metal (in this case of the best of, chrome-steel on account of its fine temper) and is provided at its lower side with the tenon 1", (shown in Fig. 6,) which fits into the mortise 1 of the bed-plate l to a nicety, so as to prevent misalinement when the two sections are brought together and which allows the sliding of the mold together or apart to receive the molten metal or take out the completed cylinder. (Shown in Fig. 7.)

5 is a shackle suitably fastened on pivotal pins 5" 5 on the side of section A and at the yoke end is provided with a handle 5*,which has a cam end 5 which is pivoted to the shackle and by means of which when the shackle is thrown over the two sections A and Band thehandle5is swungintoline,asshown, the two sections of the mold are tightly forced together, so that there will be no break or lines on the finished cylinder to show where the sections are joined. This is of great importance, since if the sections were brought together loosely they would form burs on the casting,which, if run across the screw-thread of the cylinder,would to agreat degree destroy its utility and necessitate a screw-threading which would be costly and would defeat one of the very objects we have in view.

The inner sides of section A and B are cut out, as is more distinctly shown in Fig. 6. In Fig. 6 is shown a concave view of the halfcircular depressions cut into its face, in which 6 represents that part into which the keyhub core fits when the parts are assembled for casting and forms the key-hub bore in the cylinder, the end of the key-hub core fitting into the recess 1 of the disk l,where the keyhub core is held in an upright position free from the walls of the mold, thus leaving space for the metal to surround it and form the cylinder.

6" are recesses to form gas and air vents (shown also on the face of the mold) and are provided for the escape of the air and gases contained in and formed in the chamber of the mold when the molten metal is poured in and which must be forced out to prevent the malformation of the casting and which are forced out of the mold through these vents when the metal enters the mold. 6 is the channel into which the molten metal is poured to lead it to the cylinder-chamber 6.

6 shows a recess into which fits the pinhole-former shank S, which will be hereinafter described more fully.

Fig. 6 also shows a view of the cylindern1old,showing the threaded lower end 6 of the cylinder and the shoulder (v up the side to form the recess 7 of cylinder 7 to receive retaining-screw. It will be noticed that the shank S is formed with a reduced portion S and is provided with studs S, which intrude beyond the line of the inner side of the chamber of the mold. The reduced portion S forms on the finished cylinder the recess 7 over the pin-holes to receive a small plate to prevent the pins from falling out, the edges of the recess being forced over the pin-hole plate to retain the same in place. It will also be noticed that the studs S intrude into the chamber and into recesses provided in the key-hub core E, and thus when the molten metal surrounds the studs S the pin-holes 7* are formed in the side of the cylinder, running through from the outer side to the inner wall of the hub-bore.

Fig. 3 represents a plan view showing the cylinder-mold assembled and ready for operation, showing the core E in position and the pin-hole blank S and the shackle thrown over and showing in full the detailed assemblage of all parts of the mold before the same is closed to receive the molten metal. The studs are provided to prevent the shackle from being carried too far down over the section B.

In Fig. 4 the sections are shown in the position after the molten metal has been poured in and shows the cylinder 7 formed.

The bed-plate disk 1 is provided for the purpose of receiving the end of the keywaybore core. \Ve may, if so desired, provide means in the bed-plate 1 to receive the end of the core E; but we prefer the disk,for the reason that should it become displaced in the least degree it would retard the proper working of the whole mold, and it can be removed and substituted, whereas if the recess were cut into the bed-plate it would necessitate a new one at great expense. The disk 1 is held in place by screw d The letter E represents the key-hub core and has on its side'near its lower end a number of pockets E to receive the pin-hole studs S and is also provided with a bore running from end to end to allow the quick cooling of the core. The lower end of the core E sets in the pocket of the disk 1 whereby it-is held free from the walls of the chamber of the mold and allows space for the metal to form the cylinder, the function of the core being to form the key-hub bore of the cylinder.

Figs. 8, 9, 10, 11, 12, 13, 14, 15, 16, and 17 relate to the mold for the casting of the keyhub. The general construction is about the same as the cylinder-mold. The bed-plate 1 is provided with the .disk K, which has the slot t across its face to receive the end shoulder 2' and has also at each side a boring 9' to hold the threaded pins j j, by means of which the screw-threaded boringsjj are provided in the end of the key-hub. O and D are the right and left sections of the mold and are each cut away, as shown, so as to form a cylindrical chamber when the two parts are brought together, within which is set the pin-hole-former shank or core T, having the pin-hole studs 25. The ends of these studs 25 have a slot 1: to receive the edge of the keyslot core F, the sides of which have grooves 8 8 or may be grooved in any other suitable manner, either to form the key-slot 'i, as shown in Figs. 16 and 17, or it may be of any tortuous or irregular shape, such as could not be made by hand or machine very easily, thus providing the greatest safeguard against picking. Each side of the mold is chambered alike, having the grooves c c to form ventholes for the escape of gas, as hereinbefore described. Section 0, however, has an extra recess G cut away to form a channel, into which the molten metal is poured into the chamber. In these figures, 5 is the shackle, affixed to section 0 by pivotal pins 5. At the yoke end of the shackle is affixed a handle 5 one end of which has cam 5 and is pivoted to the shackle and which when the two sections of the mold are brought together is swung to one side to allow the shackle to pass over the section D and then brought to a line at right angles with the mold, and thus the two sections, the faces of which are of even face, are forced so tightly together that no bur can be formed on the casting.

It will be noticed that the ends 3 of the handles are hooked and are not pivoted. This is necessitated by reason of the fact that the arms 3 are fixed rigidly into the ends of the mold-sections, and the handles 3 are pivoted to the arms and could not compensate for the movement out of line. The ends 3 slide into the eye, and the force to bring the sections together by the handles 3 is expended in direct lines.

Having described the various parts of our molds, it is only necessary to state that in practice when all parts are truly adjusted and the sections firmly held together by the shackle the molten metal is poured into the chamber in any suitable manner and allowed to cool. In the case of the cylinder the pinhole shank S is first withdrawn and then the key-hub core, and thereafter the sections are released and the complete cylinder is taken.

out, leaving only the castingate on the cylinder, which is out OK, and the cylinder is ready for assembling. In the case of thekeyhub the pin-hole shank T is withdrawn, and then the key way or slot core is withdrawn, and then the hub is lifted out. The screws 3' j are removed and the gate cut off, and the hub is ready for use without further manipulation.

It is obvious that the mold can be subdivided and differently arranged to assemble them and yet not depart from the object of I our invention, the essential feature of which is to provide means to cast pin-tumbler-lock cylinders and key-hubs having any or all of the features necessary-such as exterior screwthreads on cylinder, pinholes, pin hole recesses, finished key-hub bore, retaining-screw recesses, or a finished key-hub having the key slot or way of any desirable shape, and the threaded or unthreaded screw-holes at the end, and the pin-holes in the side, or any or all of such parts.

It is obvious that we may cast the cylinder or key-hub with any or all of these features without departing from the spirit of our invention.

What We claim as new, and desire to secure by Letters Patent, is

1. In a mold for casting pin-tumbler locks, the combination with a bed-plate provided with a transverse recess in its face forming a guideway, of mold-sections provided with guiding projections adapted to slide in said recess, of a plate provided with an eye or opening in each end attached to the bed-plate, said ends projecting beyond the sides of the bedplate, an arm rigidly secured to each moldsection, horizontallyarranged handles directly pivoted to said arms, and provided at their ends with curved spurs or hooks, which have a sliding movement in the eyes of the plate attached to the bed-plate, substantially as set forth.

2. In a mold for casting pin-tumbler locks, the combination with a bed-plate provided with a guideway of mold-sections adapted to slide in said guideway, rigid arms connected to each mold-section, horizontally-arranged handles directly pivoted to said arms, and provided at their ends with curved spurs or hooks, bearings secured to the base-plate with which the spurs or hooks are slidably and detachably connected, of a shackle or yoke pivoted to one of the mold-sections, stoppins on the other mold-section to limit the movement of the shackle, a cam mounted on the shackle and means for operating the cam, substantially as set forth.

3. In a mold for casting pin-tnmblerlocks, the combination with a bed-plate provided with a transverse recess forming a gnideway, a central depression in said guideway, of a disk or plate seated in said depression and detachably secured to the bed-plate, a movable core engaging said disk or plate, moldsections provided with guiding projections adapted to slide in the transverse recess of the bed-plate and means for operating the mold-sections, substantially as described.

4. The combination with a base-plate provided with a transverse recess forming a guideway, of a disk or plate seated in a recess in said guideway and detachably secured to the base-plate, mold-sections adapted to slide in said guideway, a longitudinally-removable core fitted between the mold-sections and a laterally-removable core comprisinga series of pins, each of said pins directly engaging the longitudinally-removable core, substantially as and for the purpose specified.

Signed at the borough of Bronx, city of New York, in the county of New York and State of New York, this 1st day of September, A. D. 1898.

FRANCIS KEIL. HENRY FRANCIS KEIL.

Witnesses:

HENRY F. SCHLEUMGER, ARTHUR O. BOLLINGER. 

